公开(公告)号：WO2009078599A2

公开(公告)日：2009-06-25

申请号：PCT/KR2008007064

申请日：2008-11-28

Applicant: KOREA ELECTRONICS TELECOMM ,  CHEONG MINHO ,  LEE YU-RO ,  OH JONG-EE ,  LEE SOK-KYU

Inventor： CHEONG MINHO ,  LEE YU-RO ,  OH JONG-EE ,  LEE SOK-KYU

IPC: H04B7/02 ,  H04B1/04 ,  H04B1/06

CPC classification number: H04L27/2626 ,  H04L27/2647

Abstract: Provided is a transmitter and a receiver for a high-throughput wireless communication system. The transmitter includes a baseband transmitter, a DIF transmitter, and a RF transmitter. The baseband transmitter performs a MAC protocol process on transmission signals and reception signals and processes the transmission signals by dividing an entire transmission band into n bands in a physical layer process of the transmission data, where n is a natural number. The DIF transmitter combines transmission signals of each band from the baseband transmitter and outputs m channel signals corresponding to a number of transmission antennas, where m is a natural number. The RF transmitter modulates each of the channel signals transferred from the DIF transmitter and transmits the modulated signals through m antennas.

Abstract translation: 提供了用于高吞吐量无线通信系统的发射机和接收机。 发射机包括基带发射机，DIF发射机和RF发射机。 基带发射机对发射信号和接收信号执行MAC协议处理，并且通过在发射数据的物理层处理中将整个发射频带划分为n个频带来处理发射信号，其中n是自然数。 DIF发射机组合来自基带发射机的每个频带的发射信号，并输出对应于多个发射天线的m个信道信号，其中m是自然数。 RF发射机对从DIF发射机传输的每个信道信号进行调制，并通过m个天线发射调制信号。

公开(公告)号：WO2007049944A3

公开(公告)日：2008-07-31

申请号：PCT/KR2006004432

申请日：2006-10-27

Applicant: KOREA ELECTRONICS TELECOMM ,  LEE SEUNG-JOON ,  OH JONG-EE ,  LEE YU-RO ,  KWON DONG-SEUNG

Inventor： LEE SEUNG-JOON ,  OH JONG-EE ,  LEE YU-RO ,  KWON DONG-SEUNG

IPC: H04B7/06 ,  H04L1/06

CPC classification number: H04B7/0671 ,  H04L1/0625

Abstract: An apparatus for transmitting signals with multiple antennas is disclosed. The multiple antenna transmission apparatus performs space-time encoding or space-frequency encoding, and cyclically delays the encoded symbol with a plurality of delay-values to generate a plurality of delayed symbols. The multiple antenna transmission apparatus transmits the plurality of delayed symbols to the channel through a plurality of antennas. By changing the number of space areas for encoding and the number of delay-values for delaying, the number of antennas for the multiple antenna transmission apparatus is easily expanded.

Abstract translation: 公开了一种用多个天线发射信号的装置。 多天线发送装置执行空时编码或空间频率编码，并且以多个延迟值循环地延迟编码符号，以生成多个延迟符号。 多天线发送装置通过多个天线将多个延迟符号发送到信道。 通过改变用于编码的空间区域的数量和用于延迟的延迟值的数量，多天线发送装置的天线数量容易扩大。

公开(公告)号：WO2005053198A3

公开(公告)日：2007-12-06

申请号：PCT/KR2004001836

申请日：2004-07-22

Applicant: KOREA ELECTRONICS TELECOMM ,  SAMSUNG ELECTRONICS CO LTD ,  SK TELECOM CO LTD ,  KT CORP ,  KT FREETEL CO LTD ,  HANARO TELECOM INC ,  LEE YU-RO ,  YEH CHOONG-IL ,  LIM HYOUNG-SOO ,  OH JONG-EE ,  KWON DONG-SEUNG

Inventor： LEE YU-RO ,  YEH CHOONG-IL ,  LIM HYOUNG-SOO ,  OH JONG-EE ,  KWON DONG-SEUNG

IPC: H04J11/00 ,  H04L27/26 ,  H04L20060101

CPC classification number: H04L5/0048 ,  H04L5/0007 ,  H04L25/0226 ,  H04L25/0232

Abstract: Disclosed is a method for allocating pilot subcarriers, and a method and device for transmitting and receiving pilot subcarriers in an OFDMA system. The method for allocating pilot subcarriers partitions the total bandwidth of the downlink channel into subcarrier groups having a predetermined number of subcarriers, allocates pilots to the subcarriers of the subcarrier group according to specific pilot patterns, and cycles positions of the inter-cell pilots within a specific group by a specific cycle to exchange the determined pilots according to a predetermined reference. Accordingly, pilot collision is reduced to improve accuracy of channel estimation, a number of distinguishable pilots is increased to easily perform cell planning, and a system is deployed without special cell planning.

Abstract translation: 公开了一种用于分配导频子载波的方法，以及用于在OFDMA系统中发送和接收导频子载波的方法和装置。 用于分配导频子载波的方法将下行链路信道的总带宽划分为具有预定数量子载波的子载波组，根据特定导频模式将导频分配给副载波组的子载波，并且将小区内导频的周期位置 特定组，按照预定参考交换所确定的导频。 因此，减少导频冲突以提高信道估计的准确性，增加多个可区分的导频以容易地执行小区规划，并且在没有特殊小区规划的情况下部署系统。

公开(公告)号：WO2006052058A3

公开(公告)日：2006-10-26

申请号：PCT/KR2005002592

申请日：2005-08-10

Applicant: KOREA ELECTRONICS TELECOMM ,  IND ACADEMIC COOP ,  SONG YOUNG-SEOG ,  KIM SEONG-RAG ,  CHOI IN-KYEONG ,  YEH CHOONG-IL ,  LEE SEUNG-JOON ,  LIM HYOUNG-SOO ,  LIM KWANG-JAE ,  LEE YU-RO ,  OH JONG-EE ,  KWON DONG-SEUNG ,  HWANG SEUNG-KU ,  LEE CHUNG-YONG ,  SHIN MYEONG-CHEOL

Inventor： SONG YOUNG-SEOG ,  KIM SEONG-RAG ,  CHOI IN-KYEONG ,  YEH CHOONG-IL ,  LEE SEUNG-JOON ,  LIM HYOUNG-SOO ,  LIM KWANG-JAE ,  LEE YU-RO ,  OH JONG-EE ,  KWON DONG-SEUNG ,  HWANG SEUNG-KU ,  LEE CHUNG-YONG ,  SHIN MYEONG-CHEOL

IPC: H04B7/04 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04N7/08

CPC classification number: H04B7/061 ,  H04B7/0669 ,  H04B7/0691 ,  H04B7/08 ,  H04L1/0003 ,  H04L1/0637 ,  H04L1/0675

Abstract: The present invention relates to a multi-input multi-output (MIMO) system for enhancin transmission performance. The MlMO system uses space-time encoding and transmi antenna selection methods, and includes a transmitter (100) and a receiver (200). Th transmitter (100) includes N transmit antennas (130-1 , 130-4) that are more than M tansrni antennas (130-1 , 130-3) used for tansmitting a signal to space channel, selects the M transmi antennas (130-1, 130-3) among the N tansmit antennas (130-3 130-4), and tansmits symbol by space-time encoding the symbol. The receiver (200) includes M receive antenna (120-1 , 210-2) for receiving a signal from the space channel, detects an information symb by using the signal received through the receive antenna (210-1 , 210-2), generates transmi antenna selection information for selecting M transmit antennas (130-1 , 130-3) among tansmit antennas (i30-1,...7130-4) with reference to a channel estimate, and returns th information to the tansmitter.

Abstract translation: 本发明涉及用于增强传输性能的多输入多输出（MIMO）系统。 M10M系统使用时空编码和天线选择方法，并且包括发射机（100）和接收机（200）。 Th发射机（100）包括N个发射天线（130-1,130-4），其多于用于将信号转发到空间信道的M个天线（130-1,130-3），选择M个发射天线（130 -1,130-3），并且通过对码元进行空时编码来对码元进行篡改。 接收器（200）包括用于从空间信道接收信号的M个接收天线（120-1,210-2），通过使用通过接收天线（210-1,210-2）接收的信号来检测信息， 生成用于参照信道估计在篡改天线（i30-1，... 7130-4）中选择M个发送天线（130-1,130-3）的发送天线选择信息，并将该信息返回给转发器。

公开(公告)号：WO2005048497A2

公开(公告)日：2005-05-26

申请号：PCT/KR2004002436

申请日：2004-09-22

Applicant: KOREA ELECTRONICS TELECOMM ,  SAMSUNG ELECTRONICS CO LTD ,  KT CORP ,  SK TELECOM CO LTD ,  KT FREETEL CO LTD ,  HANARO TELECOM INC ,  LEE YU-RO ,  HONG DAE-SIK ,  KIM SEONG-RAG ,  CHOI IN-KYEONG ,  YEH CHOONG-IL ,  LIM HYOUNG-SOO ,  CHO SEONG-CHUL ,  OH JONG-EE ,  KWON DONG-SEUNG ,  AHN JEE-HWAN ,  HWANG SEUNG-KU

Inventor： LEE YU-RO ,  HONG DAE-SIK ,  KIM SEONG-RAG ,  CHOI IN-KYEONG ,  YEH CHOONG-IL ,  LIM HYOUNG-SOO ,  CHO SEONG-CHUL ,  OH JONG-EE ,  KWON DONG-SEUNG ,  AHN JEE-HWAN ,  HWANG SEUNG-KU

IPC: H04J11/00 ,  H04L20060101 ,  H04L

CPC classification number: H04L25/0232 ,  H04L25/0204 ,  H04L27/2647

Abstract: Disclosed is a time-varying channel estimation method in an OFDM which comprises: (a) generating a pilot symbol by a comb type method for inserting a pilot symbol into a specific subcarrier for each interval in each OFDM symbol; (b) transmitting the pilot symbol to a receiver from a transmitter through a time-varying channel by using at least two multiple transmit antennas; (c) receiving the pilot signal through the time-varying channel; and (d) estimating a first channel of from among the time-varying channel according to an interpolation method which uses a temporal correlation of a second channel and a third channel.

Abstract translation: 公开了一种OFDM中的时变信道估计方法，包括：（a）通过梳状方法生成导频符号，用于在每个OFDM符号中针对每个间隔将导频符号插入特定子载波; （b）通过使用至少两个多个发射天线通过时变信道从发射机向接收机发射导频符号; （c）通过时变信道接收导频信号; 以及（d）根据使用第二信道和第三信道的时间相关性的内插方法，估计时变信道中的第一信道。

公开(公告)号：EP2496010A4

公开(公告)日：2013-11-06

申请号：EP10827154

申请日：2010-10-30

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： LEE YU-RO ,  SON JUNG-BO ,  LEE SOK-KYU

IPC: H04W28/06 ,  H04B7/04 ,  H04L5/00 ,  H04W48/08 ,  H04W84/12

CPC classification number: H04W72/0406 ,  H04B7/0452 ,  H04L1/007 ,  H04L1/0072 ,  H04L1/0606 ,  H04L1/0612 ,  H04L5/0023 ,  H04L5/0053 ,  H04L5/0073 ,  H04W28/04 ,  H04W28/06 ,  H04W28/22 ,  H04W48/08 ,  H04W80/04 ,  H04W84/12

Abstract: The present invention relates to a method and an apparatus for transmitting control and training symbols to improve transmission efficiency in a multi-user wireless communication system. The method for transmitting the control and training symbols in the multi-user wireless communication system according to one embodiment of the present invention comprises the steps of: determining whether a required transmission rate of each data can be satisfied through channel estimation in each of terminals when different data are simultaneously transmitted to each of the terminals; and transmitting a data frame to each of the terminals, the data frame being composed to discriminate the control and training symbols in each of the terminals using a combination of time, frequency, and code area when the required transmission rate of each data is not satisfied according to the determined result.

公开(公告)号：EP1815613A4

公开(公告)日：2012-03-07

申请号：EP05774149

申请日：2005-08-10

Applicant: KOREA ELECTRONICS TELECOMM ,  UNIV YONSEI IACF

Inventor： SONG YOUNG-SEOG ,  KIM SEONG-RAG ,  CHOI IN-KYEONG ,  YEH CHOONG-IL ,  LEE SEUNG-JOON ,  LIM HYOUNG-SOO ,  LIM KWANG-JAE ,  LEE YU-RO ,  OH JONG-EE ,  KWON DONG-SEUNG ,  HWANG SEUNG-KU ,  LEE CHUNG-YONG ,  SHIN MYEONG-CHEOL

IPC: H04B7/04 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04N7/08

CPC classification number: H04B7/061 ,  H04B7/0669 ,  H04B7/0691 ,  H04B7/08 ,  H04L1/0003 ,  H04L1/0637 ,  H04L1/0675